I have a 01 accord f23 I've done alot of work to it new head gasket.water pump timing belt and it come out of limp mode before ran fine but after I replaced the master.cylinder it went back in now the check engine light flashes while driving the codes it puts out are 1 n 3 misfire vtec malfunction and knock sensor which I replaced when head was off ne help please?

 

Can you give the actual code numbers?

I don't want to guess but I will...are you getting a P0301, P0303...maybe a P1399 and a P1259?

 

I have no idea I don't have a scan tool I just tripd the light counted the flashes and looked em up and that's what it gave me
I put new header pipe on and oil pan gasket oil change all that last night and cleaned my vtec now it's only throwing misfire 1 + 3 and knock

 

When you replaced the head gasket, did you have a machine shop check the head? Even if you did, I'd do a compression test.

 

Yea it should be good my cousin did the head and intake at gibson high performance which he owns out here in va you think it could've gone bad since then? IM working on getting it checked soon